90984890 has 16 divisors (see below), whose sum is σ = 169420680. Its totient is φ = 35138880.

The previous prime is 90984827. The next prime is 90984923. The reversal of 90984890 is 9848909.

It can be written as a sum of positive squares in 4 ways, for example, as 83850649 + 7134241 = 9157^2 + 2671^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156581 + ... + 157160.

Almost surely, 2^90984890 is an apocalyptic number.

90984890 is a deficient number, since it is larger than the sum of its proper divisors (78435790).

90984890 is a wasteful number, since it uses less digits than its factorization.

90984890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313777.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 90984890 is about 9538.6000020967. The cubic root of 90984890 is about 449.7692479498.

The spelling of 90984890 in words is "ninety million, nine hundred eighty-four thousand, eight hundred ninety".